E87 - Central Information Display
Installation location
The Central Information Display (CID) is installed in the center of the dashboard. The installation position is at the ideal height relative to the instrument cluster. This arrangement means that drivers can keep the traffic in peripheral view even when their attention is directed toward the CID.
Construction
| Key | Explanation | Key | Explanation |
|---|---|---|---|
| 1 | Drive for folding display | 2 | Folding display |
| 3 | LVDS data line | 4 | Connector for the onboard power supply |
The CID is folding and the drive for the display is mounted on the side.
The CID has a phototransistor for brightness control of the LCD (dependent on ambient luminosity). The LCD is heated.
The Central Information Display is connected by a LVDS data line (Low Voltage Differential Signalling) to the M-ASK or CCC. The LVDS data line technology can reliably transmit graphical data over lengthy distances. Special connectors were developed for the LVDS data line.
The M-ASK or the CCC generates the data for graphical output on the Central Information Display.
Pin assignment X13822, 6-pin
| Pin | Type | Explanation |
|---|---|---|
| 1 | V | Power supply with terminal 30g-f (specific MOST nodes will be switched off if a fault develops in idle state) |
| 2 | --- | --- |
| 3 | M | Terminal 31, earth |
| 4 | --- | --- |
| 5 | E/A | K-CAN High |
| 6 | E/A | K-CAN Low |
| E/A = Input and output | ||
| M = Earth | ||
| V = Supply | ||
| For current specifications regarding pin assignment, please refer to BMW diagnosis system | ||
Pin assignment X13823, 10-pin
| Pin | Type | Explanation |
|---|---|---|
| 1 | E | LVDS channel 2 (positive) |
| 2 | E | LVDS channel 2 (negative) |
| 3 | --- | --- |
| 4 | E | LVDS channel 1 (positive) |
| 5 | E | LVDS channel 1 (negative) |
| 6 | E | LVDS synchronization (positive) |
| 7 | E | LVDS synchronization (negative) |
| 8 | --- | --- |
| 9 | E | LVDS channel 0 (positive) |
| 10 | E | LVDS channel 0 (negative) |
| E = Input | ||
| For current specifications regarding pin assignment, please refer to BMW diagnosis system | ||
How it works
As in the E65, the CID is a display with what is known as a "transflective" surface. Transflective is a term formed by combining the words "transmissive" and "reflective". The surface reflects daylight shining on it: this ambient light makes other displays unreadable. This reflective property means that daylight is incorporated into the volume of light in the display. The display becomes brighter. When ambient light levels are low and in the dark, the readability of the display is ensured by the transmissive background lighting.
The display is also heated. This ensures that it reaches its optimum operating temperature quickly at low ambient temperatures and improves readability.
The CID has an integral phototransistor for controlling the brightness of the display. In order to control brightness correctly, the CID evaluates the following signals:
- Dimmer signal from the instrument cluster (dimmer setting) via the K-CAN
- Signal from the central photocell in the instrument cluster via the K-CAN
The display brightness (brightness offset) can be adjusted. Condition: The control setting for the phototransistor is between 1 % and 50 %. If the phototransistor modulation is greater than approximately 50 %, the phototransistor only adjusts the brightness of the display. To access the brightness setting in CID, the "Brightness" option in the "Settings" menu under "Settings Display" must be selected (also see notes for service staff).
The display is opened at terminal R ON. The display can be adjusted by hand. When the display is closed, its position is saved by the CID for the next time it is opened. The display closes automatically if it cannot be feasibly viewed from the manually-adjusted position.
The display is closed at terminal R OFF. The display can also be closed using the "Settings" menu. The next time the controller is operated, the display opens automatically.
The display can be unfolded by using the following functions:
- Incoming telephone call
- Check-Control message
- Navigation instruction
- Switching on voice recognition system
- Image display for Park Distance Control
The individual functions can be switched on and off via the "Settings Display" menu.